On 06.12.2013 10:13, Andreas Kasenides wrote: > The scenario is a classic one: > 1. one or more relay SMTP servers in DMZ > 2. one or more backend SMTP servers on the inside network > 3. There may or may not be separate incoming or outgoing designated SMTP > servers. > > Now the desired functionality is (of course): > 1. relay machines receive messages from outside AND inside > 2. relays check for all the bad things (spam, viruses etc). > 3. for incoming messages relays check for valid local users and reject > messages for invalid users
Have a look at verify(8) and the address_verify_* variables in main.cf With this you can dynamically verify recipients on your backend SMTP servers. Regards -- Robert Sander Heinlein Support GmbH Schwedter Str. 8/9b, 10119 Berlin http://www.heinlein-support.de Tel: 030 / 405051-43 Fax: 030 / 405051-19 Zwangsangaben lt. §35a GmbHG: HRB 93818 B / Amtsgericht Berlin-Charlottenburg, Geschäftsführer: Peer Heinlein -- Sitz: Berlin
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